Fairman, Charles, author
Henry Holt and Company, 1948
Buku Teks
Dowling, Noel T., author
Foundation Press, 1954
Buku Teks
Tribe, Laurence H., author
Foundation Press, 1979
Buku Teks
Tribe, Laurence H., author
Foundation Press, 1978
Buku Teks
Wright, Benjamin F., author
Phoenik Books, 1967
Buku Teks